Shinya Inazumi, Kozo Okita, Takumi Kondo, and Kenji Kazarashi. “In-Situ Ground Surveying by the NSWS Testing Machine”. GEOMATE Journal 1, no. 1 (October 29, 2011): 1–9. Accessed April 27, 2024. https://geomatejournal.com/geomate/article/view/1188.